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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-06-20 16:11:20 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 12:48:31 +0200 |
| commit | 3c999f142665265afd0fe9190204dd051f17e505 (patch) | |
| tree | 83b764c2a90890c22b199d6445cf2e132babe455 /arch/x86/kernel/setup_64.c | |
| parent | 88a6846c70ad6bf33a545d554ace801d69e8a1a5 (diff) | |
| download | linux-3c999f142665265afd0fe9190204dd051f17e505.tar.gz linux-3c999f142665265afd0fe9190204dd051f17e505.tar.bz2 linux-3c999f142665265afd0fe9190204dd051f17e505.zip | |
x86: check command line when CONFIG_X86_MPPARSE is not set, v2
if acpi=off, acpi=noirq and pci=noacpi, we need to disable apic.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/setup_64.c')
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index a93300de4da9..175c696ec536 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -302,6 +302,11 @@ void __init setup_arch(char **cmdline_p) parse_early_param(); + if (acpi_mps_check()) { + disable_apic = 1; + clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); + } + #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT if (init_ohci1394_dma_early) init_ohci1394_dma_on_all_controllers(); @@ -723,6 +728,10 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) cpu_devs[c->x86_vendor]->c_early_init(c); validate_pat_support(c); + + /* early_param could clear that, but recall get it set again */ + if (disable_apic) + clear_cpu_cap(c, X86_FEATURE_APIC); } /* |